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<title>Getting Input: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial</title>

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                <h1>Getting Input</h1>

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                <p>So far we have seen a method like <strong>puts</strong> that writes to the screen. How does one accept user input? For this <strong>gets</strong> (get a string) and <strong>chomp</strong> are useful. The example <strong>p005methods.rb</strong> below illustrates the same.
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                <div class="column2">
                <!-- InstanceBeginEditable name="Code" -->
                <textarea name="code" class="ruby:nogutter:nocontrols" rows="15" cols="60">
                # p005methods.rb
                # gets and chomp
                puts "In which city do you stay?"
                STDOUT.flush
                city = gets.chomp
                puts "The city is " + city
                </textarea>
                <!-- InstanceEndEditable -->
                </div>

                <p><b>STDOUT</b> is a global constant which is the actual standard output stream for the program. <b>flush</b> flushes any buffered data within io to the underlying operating system (note that this is Ruby internal buffering only; the OS may buffer the data as well). The usage is not mandatory but recommended. <b>Note: STDOUT.sync = true</b> will allow you to have flushed Ruby based IO without repeated <b>.flush</b> calls.</p>

                <p><b>gets</b> accepts a single line of data from the standard input - the keyboard in this case - and assigns the string typed by the user to city. The standard input is a default stream supplied by many operating systems that relates to the standard way to accept input from the user. In our case, the standard input is the keyboard.</p>

                <p><b>chomp</b> is a string method and <b>gets</b> retrieves only strings from your keyboard. You must have realised that <b>gets</b> returns a string and a '\n' character, while <b>chomp</b> removes this '\n'.</p>

                <p class="post-note">
                <strong>IN RAILS</strong>: Data comes from many sources. In the typical Rails application, it comes from a database. As a Rails developer, you may find yourself using relatively few of these facilities, because Rails does the data-fetching for you; and your users, when they input from the keyboard, will generally be typing on a Web form.
                </p>

                <p style="background-color: #FAFAFA; padding: 5px; margin-top: 20px; font-size: 65%;"><strong>Note</strong>: The Ruby Logo is Copyright (c) 2006, Yukihiro Matsumoto. I have made extensive references to information, related to Ruby, available in the public domain (wikis and the blogs, articles of various <span style="font-weight: bold;" title="Click Gurus on the menu above">Ruby Gurus</span>), my acknowledgment and thanks to all of them. Much of the material on <a href="/">rubylearning.github.io</a> and in the course at <a href="http://rubylearning.org/">rubylearning.org</a> is drawn <strong>primarily</strong> from the <strong>Programming Ruby book</strong>, available from <a href="http://pragprog.com/book/ruby3/programming-ruby-1-9-2-0">The Pragmatic Bookshelf</a>.</p>

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